A power-saving circuit for a digital video display device includes a TMDS driving unit converting a TMDS data signal and a TMDS clock signal, a display driving unit driving a display unit based on the horizontal/vertical synchronous signals and the digital video signal input from the TMDS driving unit, a clock signal detecting unit outputting a first or a second level of a clock detecting signal depending on the TMDS clock signal, a controller outputting a first-level of a power-saving signal when the first level clock detecting signal is input, and outputting a second level of power-saving signal when the second level clock detecting signal is input, and a power supply unit supplying a voltage to respective components, and cutting off the supply of the voltage to respective components depending on the level of the power-saving signal or the clock detecting signal.

Power-saving circuit and method for a digital video display device

PURPOSE: An apparatus for stabilizing power of a mobile communication terminal is provided to maintain a call standby state by automatically recovering power when power is instantaneously interrupted by an external impact. CONSTITUTION: A power input unit(100) inputs an external power such as a battery, a charger, or a handsfree device. A power supply switch unit(200) generates a power switch signal so that a user can turn on a switch of a mobile communication terminal. A power control unit(300) processes the power inputted from the power input unit(100) according to the power switch signal transmitted from the power supply switch unit(200). A terminal power unit(400) inputs the power processed in the power control unit(300). A terminal control unit(500) continuously supplies a power control signal to the power control unit(300) using a program installed for maintaining a power state of the mobile communication terminal when the power is supplied to the terminal power unit(400). A power blocking sensing unit(600) senses abnormal power block when the power of the mobile communication terminal is turned on and transmits a corresponding sensing signal to the power control unit(300).

Apparatus for controlling the source of electric power with mobile-telecommunication terminal

The power and the back-light of a cellular phone is controlled according to the open/close state of a cover. The apparatus includes a detector(5) for detecting the open/close state of a cover and the on/off state of power, a memory(4) for storing data necessary to operate a cellular phone, and a CPU(1) for generating control signals for controlling a back-light and power according to the output signals of the detector(5).

Im Yun-Ku

Papers

The power/back-lighting on-off device in flip typed cellularphone